%0 Journal Article %A Lu LI %A Linghui LIU %A Jinming XU %A Yanqiang HUANG %A Tao ZHANG %T Synthesis of ruthenium-embedded nitrogen-doped graphene for carbon dioxide hydrogenation %D 2020 %R 10.11949/0438-1157.20200680 %J CIESC Journal %P 4800-4807 %V 71 %N 10 %X

Two-dimensional (2D) layered materials have attracted great interest in the energy storage and catalysis field due to their graphene-like structure and excellent performance. Ruthenium-embedded nitrogen-doped graphene (Ru-NG) have been obtained by a novel method, using montmorillonite as hard template and Ru-phenanthroline chelate as precursor. After calcination in N2 atmosphere at 800℃, Ru-NG were obtained and further characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS) and nitrogen sorption. Ru-NG have 2D layered structure just like the montmorillonite template, and C, N, O and Ru are homogeneously distributed on them. The average sizes of Ru nanoparticles do not change much with the increasing of Ru content, and they keep at about 1.2 to 1.4 nm. The XPS results indicate that phenanthroline has been successfully transformed to nitrogen-doped carbon during pyrolysis, and the peaks at 398.5, 400.1 and 401.5 eV suggest the presence of pyridine-like, pyrrole-like and quaternary nitrogen atoms, respectively. Compared with the Ru catalyst supported on activated carbon prepared by the traditional impregnation-reduction method, Ru-NG exhibits excellent catalytic activity in the reaction of hydrogenation of carbon dioxide to formic acid.

%U https://hgxb.cip.com.cn/EN/10.11949/0438-1157.20200680